This diagram covers Negative Feedback Loop within Homeostasis Intro for GCSE Biology. Topic 1: Homeostasis Intro It is section 5 of 13 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

🧭 Negative Feedback Loop

Painted circular flow diagram of negative feedback. 5 steps in a clockwise loop: (1) set point (e.g. body temp 37°C with thermometer icon), (2) change detected (rise or fall with up/down arrows), (3) receptors (eye icon for skin/brain hypothalamus), (4) coordinator (brain icon for nervous/hormonal signal), (5) effectors (muscle icon for muscles/glands acting). Central scale balance icon shows equilibrium maintained. Parchment scroll:

Figure 1: The negative feedback loop — any deviation from normal triggers a corrective response in the opposite direction.

Note the key feature: the arrows always point back toward the centre (the normal level). The response is always in the opposite direction to the deviation. This is what makes it negative feedback.

Practice questions for Homeostasis Intro

What is homeostasis?

A. The maintenance of a stable internal environment in the body
B. The process by which cells divide and grow
C. The movement of substances across a cell membrane
D. The release of hormones during exercise

1 markfoundation

State the definition of homeostasis and give two examples of what the body regulates.

2 marksstandard

Quick recall flashcards

What is homeostasis?

The maintenance of a stable internal environment despite changes in external conditions. The body regulates temperature, blood glucose, and water balance.

What is an effector?

An effector carries out the response to restore normal conditions. Effectors are muscles (contract) or glands (secrete hormones or other substances).

Negative Feedback Loop